✍ Scribed by R.H.O.
No coin nor oath required. For personal study only.
Power, Vol. 81, No. I.)
This country's first coal handling system using a traveling pipe line for transporting coal went into operation recently at the Whippany, N. J., plant of Manhattan Rubber Mfg. Division of Raybestos-Manhattan, Inc. This conveyor operates on an entirely new principle. A heavy walled rubber tube, split longitudinally, divides to receive coal from the track hopper, closes, then rises 80 ft. and opens to discharge into a storage silo. Replacing a bucket elevator, the new system handles 9 tons of anthracite rice coal an hour. Capacity is based on the 2-inch internal diameter conveying tube traveling 3oo ft. a minute. Mechanical simplicity, cleanliness, quietness and freedom from vibration are notable. Each half of the moving conveyor tube is really an endless belt with a chain embedded in the rubber to give mechanical strength, the chain carrying the load and the rubber acting as a casing for the material. Double tongue-and-groove joints seal when the belts are put together. After the halves are in place, making a tube, the assembly is twisted like a rope, compressing the joints, making a tighter seal and preventing the tube from opening. The loading half of the conveyor is fitted with disc-like partitions or flights which pick up a full load when passing through the loading hopper and prevent slipping and backing on the vertical lift. Loading at the track hopper is made possible by separating and guiding the two halves of the tube around separate sheaves. Coal flows from the hopper into the load belt, which then passes under the sheave around which the belt cover is running, joint side out. This forces the two sections together. In emptying the tube, guide rollers first remove the twist from a section directly over the discharge hopper, leaving the joints vertical. The halves separate, dump the load, pass over separate drive pulleys, and are resealed. Then the twist is restored and the conveyor returns to the loading hopper.
R. H. O.
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